In geometry, a hendecagon (also undecagon [1] [2] or endecagon [3]) or 11-gon is an eleven-sided polygon. (The name hendecagon, from Greek hendeka "eleven" and –gon "corner", is often preferred to the hybrid undecagon, whose first part is formed from Latin undecim "eleven". [4])

Some say that the word undecagon is incorrect because it is derived from Latin (una - "one") whereas most polygon names are Greek in origin. By that rule it would be called a hendecagon instead. To avoid confusion simply call it an 11-gon.

2025年2月27日 · A hendecagon is an 11-sided polygon, also variously known as an undecagon or unidecagon. The term "hendecagon" is preferable to the other two since it uses the Greek prefix and suffix instead of mixing a Roman prefix and Greek suffix.

What Is a Polygon? How Is Undecagon Used in Coinage? An undecagon is an 11-sided polygon referred to as a hendecagon or an undecagon. Regular undecagons have all sides the same length and vertices that are evenly placed around a circle. Undecagon has 11 sides and 11 angles, all of the sides and angles are equal. It also has 11 vertices.

Illustrated definition of Undecagon: An 11-sided polygon (a flat shape with straight sides). The more correct name is Hendecagon.

The meaning of UNDECAGON is a plane figure having eleven angles and eleven sides.

a polygon having 11 angles and 11 sides. 1720–30; < Latin un-, as in undecim eleven ( ūn ( us ) one + -decim, combining form of decem ten ) + decagon. Fortuitously for Malay et al., the …

2024年11月8日 · (geometry) A polygon with eleven sides and eleven angles.

Undecagon is a synonym of hendecagon. In geometry terms the difference between hendecagon and undecagon is that hendecagon is a polygon with eleven edges and eleven angles while undecagon is a polygon with eleven sides and eleven angles.

A hendecagon or undecagon or 11-gon is a shape with 11 sides and 11 corners. All sides of a regular hendecagon are the same length. Each corner is 147. 27 °. All corners added together equal 1619. 97 °. The amount of space a regular hendecagon takes up is. a is the length of one of its sides. This short article about mathematics can be made longer.